Are Carbon Fiber mountain bikes safe?

i really don't like them especially the trek carbon frames(they seem to be thinner then other brands like cannondale), seem way to Fragile, one crash or hard hit and they can snap at the bottom bracket or fork, and alloy frames have a lift time warranty as well. I would not buy one but that me.

Lifetime warranty on the frame should put your mind at ease. The only way you are gonna bust a carbon frame is thru extreme abuse and many crashes. If that sounds like you, then perhaps a nice steel framed bike is for you.

I have seen too many cf frames broken on epic rides to want to risk getting one, there is one corner on the Monarch Crest trail that eats cf frames, over ride it a little too much and smack into a wedge shaped rock.

A lifetime warranty doesn't do you any good when you are 15 miles in a 40 mile ride with a smashed down tube...

If you can afford cf then you can also afford Ti.

It's the bore for the drop 'bar that's important as the bars need the right size in the clamp. Most stems are standard so if the stem is for the same size hole in the frame and the right size hole for the 'bars see no problem. Your biggest problem is to make sure if you can get 'off-road offset' drop handlebars if you can as the shape is better for a mountain bike. Straight handlebar stems and drop handlebar stems will have a different bore/hole size as drop bars are fatter.

It is safe as long as you stay on it and it does not break. I think I have seen a few to many broken forks to get a carbon mtn bike.